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Connecting Using: sqlplus "/ as sysdba" Fails with ORA-12547 with Lower Ulimit Setting (Doc ID 878375.1)

Last updated on FEBRUARY 02, 2022

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 8.1.7 to 10.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Solaris on SPARC (64-bit)
Sun Solaris SPARC (64-bit)


$sqlplus "/ as sysdba" fails with ORA-12547 .

You may have more than one database up and running under the same oracle home . When you try to bring up a database while connecting as "/ as sysdba" , the BEQ connection fails with ORA-12547 .

You might see significant delay after the sqlplus "/ as sysdba" is fired and before ORA/TNS-12547 occurs.

The problem still persists even after performing $relink all  . No error/warning messages in the OS logs.

sqlnet client trace may show the following error stack :


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